pqp/dist/commonjs/operations/randomgen.js

NodeJS version of libPQP

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

exports.zeroArray = zeroArray;

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

// from MDN(https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/random)
function getRandomInt(min, max) {
  min = Math.ceil(min);
  max = Math.floor(max);
  return Math.floor(Math.random() * (max - min)) + min; //The maximum is exclusive and the minimum is inclusive
}

// fill array of `size` with `0`
function zeroArray(size) {
  var result = new Float32Array(size);
  result.fill(0);
  return result;
}

var RandomGenerator = function () {
  function RandomGenerator() {
    _classCallCheck(this, RandomGenerator);
  }

  _createClass(RandomGenerator, [{
    key: "get_random_vector",
    value: function get_random_vector(size) {
      var result = new Float32Array(size);
      for (var i = 0; i < size; i++) {
        result[i] = getRandomInt(0, 2);
      }return result;
    }
  }, {
    key: "get_random_weight_vector",
    value: function get_random_weight_vector(length, weight) {
      var random_indices = new Set();
      for (var _ = 0; _ < weight; ++_) {
        random_indices.add(getRandomInt(0, length));
      }

      while (random_indices.size < weight) {
        random_indices.add(getRandomInt(0, length));
      }

      var real = zeroArray(length);
      random_indices.forEach(function (idx) {
        return real[idx] = 1;
      });
      return real;
    }
  }, {
    key: "flip_coin",
    value: function flip_coin() {
      return getRandomInt(0, 2);
    }
  }]);

  return RandomGenerator;
}();

exports.default = RandomGenerator;